A baby throwing up all that stuff is just his/her pre-verbal way of showing his/her feelings.
For instance, Elmer Lou pukes all over Aunt Hester Anne's back.
That is simply little Elmer Lou's comment on the horrible way Aunt Hester dresses and that she's wearing the wrong shoes for the rest of her ensemble.
Plus her right earring is sticking me in a bad place.
-I.B. Moleturd